Sewing machine



FIG. 1 is a perspective view of a first embodiment of a sewing machine showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof

FIG. 8 is a perspective view of a second embodiment of a sewing machine showing my new design;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a top view thereof;

FIG. 12 is a bottom view thereof;

FIG. 13 is a left side view thereof;

FIG. 14 is a right side view thereof

FIG. 15 is a perspective view of a third embodiment of a sewing machine showing my new design;

FIG. 16 is a front view thereof;

FIG. 17 is a rear view thereof;

FIG. 18 is a top view thereof;

FIG. 19 is a bottom view thereof;

FIG. 20 is a left side view thereof;

FIG. 21 is a right side view thereof

FIG. 22 is a perspective view of a fourth embodiment of a sewing machine showing my new design;

FIG. 23 is a front view thereof;

FIG. 24 is a rear view thereof;

FIG. 25 is a top view thereof;

FIG. 26 is a bottom view thereof;

FIG. 27 is a left side view thereof; and,

FIG. 28 is a right side view thereof. 

The ornamental design for a sewing machine, as shown and described. 